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Finding the Fourth Proportional to 74,691.75, 103,073.28 and 40,700.47

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Solution

The fourth proportional to 74,691.75, 103,073.28 and 40,700.47 is: 56,165.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,691.75 : 103,073.28 = 40,700.47 : x
  2. Step 2: Convert to fraction form
    74,691.75/103,073.28 = 40,700.47/x
  3. Step 3: Cross multiply
    74,691.75x = 103,073.28 × 40,700.47
  4. Step 4: Simplify right side
    74,691.75x = 4,195,130,940.44
  5. Step 5: Solve for x
    x = 4,195,130,940.44/74,691.75
  6. Step 6: Final answer
    x = 56,165.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.